是这样子的,有2个用户界面线程，一个显示线程（CDisplayThread）,和一个计数线程（CCounterThread)这两个线程同时操作一个字符串变量m_strNumber。其中显示线程将该字符串在列表框中显示，而计数线程则将该字符串中的整数+1.其中进程可调整，计数线程，显示线程的优先级都可以调整。同步机制采用CMutex和CSingleLock来保证两个线程不能同时访问该字符串m_strNumber。同步机制执行与否将影响程序的执行结构。且两个线程可以暂时挂起，以便查看结果等。


界面如附件：(执行后列表框内没有信息）

代码如下：
#if !defined(AFX_EXAMPLETHREAD_H__0F85EFD4_065B_43C2_9406_073E240FB4FD__INCLUDED_)
#define AFX_EXAMPLETHREAD_H__0F85EFD4_065B_43C2_9406_073E240FB4FD__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// ExampleThread.h : header file
//
#include "MultiThreadDlg.h"

/////////////////////////////////////////////////////////////////////////////
// CExampleThread thread

class CExampleThread : public CWinThread
{
DECLARE_DYNCREATE(CExampleThread)
protected:
CExampleThread(); // protected constructor used by dynamic creation

// Attributes
public:
CMultiThreadDlg* m_pOwner;
BOOL m_bDone;
void SetOwner(CMultiThreadDlg* pOwner)
{
m_pOwner=pOwner;
};

// Operations
public:

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CExampleThread)
public:
virtual BOOL InitInstance();
virtual int ExitInstance();
//}}AFX_VIRTUAL

// Implementation
protected:
virtual ~CExampleThread();

// Generated message map functions
//{{AFX_MSG(CExampleThread)
// NOTE - the ClassWizard will add and remove member functions here.
//}}AFX_MSG

DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////
class CDisplayThread: public CExampleThread //新添加的类(CExampleThread是工程中的类)
{
DECLARE_DYNCREATE(CDisplayThread)
public:
virtual int Run();
DECLARE_MESSAGE_MAP()
};

class CCounterThread: public CExampleThread //新添加的类(CExampleThread是工程中的类)
{
DECLARE_DYNCREATE(CCounterThread)
public:
virtual int Run();
DECLARE_MESSAGE_MAP()
};
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_EXAMPLETHREAD_H__0F85EFD4_065B_43C2_9406_073E240FB4FD__INCLUDED_)


// ExampleThread.cpp : implementation file
//

#include "stdafx.h"
#include "MultiThread.h"
#include "ExampleThread.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#include "afxmt.h"
/////////////////////////////////////////////////////////////////////////////
// CExampleThread

IMPLEMENT_DYNCREATE(CExampleThread, CWinThread)

CExampleThread::CExampleThread()
{
m_bDone=FALSE;
m_pOwner=NULL;
}

CExampleThread::~CExampleThread()
{
}

BOOL CExampleThread::InitInstance()
{
// TODO: perform and per-thread initialization here
return TRUE;
}

int CExampleThread::ExitInstance()
{
// TODO: perform any per-thread cleanup here
return CWinThread::ExitInstance();
}

BEGIN_MESSAGE_MAP(CExampleThread, CWinThread)
//{{AFX_MSG_MAP(CExampleThread)
// NOTE - the ClassWizard will add and remove mapping macros here.
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CExampleThread message handlers
IMPLEMENT_DYNCREATE(CCounterThread, CExampleThread)
int CCounterThread::Run()
{
BOOL fSyncChecked;
unsigned int nNumber;
if(m_pOwner==NULL)
return -1;

CSingleLock sLock(&(m_pOwner->m_mutex));
while(!m_bDone)
{
fSyncChecked=m_pOwner->IsDlgButtonChecked(IDC_SYNCHRONIZE);
if(fSyncChecked)
sLock.Lock();

_stscanf((LPCTSTR)m_pOwner->m_strNumber,_T("%d"),&nNumber);
nNumber++;
m_pOwner->m_strNumber.IsEmpty();
while(nNumber!=0)
{
m_pOwner->m_strNumber+=(TCHAR)('0'+nNumber%10);
nNumber/=10;
}

m_pOwner->m_strNumber.MakeReverse();
if(fSyncChecked)
sLock.Unlock();

if(m_pOwner->IsDlgButtonChecked(IDC_SHOWCNTRTHRD))
m_pOwner->AddToListBox(_T("Counter: Add 1"));
}

m_pOwner->PostMessage(WM_CLOSE,0,0L);
return 0;
}

BEGIN_MESSAGE_MAP(CCounterThread, CExampleThread)
//{{AFX_MSG_MAP(CCounterThread)
//NOTE-the Class Wizard will add and revove mapping macros here.
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

IMPLEMENT_DYNCREATE(CDisplayThread,CExampleThread)
int CDisplayThread::Run()
{
BOOL fSyncChecked;
CString strBuffer;
ASSERT(m_pOwner!=NULL);
if(m_pOwner==NULL)
return -1;

CSingleLock sLock(&(m_pOwner->m_mutex));
while(!m_bDone)
{
fSyncChecked=m_pOwner->IsDlgButtonChecked(IDC_SYNCHRONIZE);
if(fSyncChecked)
sLock.Lock();

strBuffer=_T("Display:");
strBuffer+=m_pOwner->m_strNumber;
if(fSyncChecked)
sLock.Unlock();

m_pOwner->AddToListBox(strBuffer);
}
m_pOwner->PostMessage(WM_CLOSE,0,0L);
return 0;
}

BEGIN_MESSAGE_MAP(CDisplayThread,CExampleThread)
//{{AFX_MSG_MAP(CDisplayThread)
//NOTE-the ClassWizard will add and remove mapping macros here.
//}}AFX_MSG_MAP

END_MESSAGE_MAP()

代码如下：
// MultiThreadDlg.h : header file
//

#if !defined(AFX_MULTITHREADDLG_H__162F3F84_AB2C_4167_A04F_5CABB7B16FAE__INCLUDED_)
#define AFX_MULTITHREADDLG_H__162F3F84_AB2C_4167_A04F_5CABB7B16FAE__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include <afxmt.h>
//

/////////////////////////////////////////////////////////////////////////////
// CMultiThreadDlg dialog

class CMultiThreadDlg : public CDialog
{
// Construction
friend class CDisplayThread;
friend class CCounterThread;

public:
CMultiThreadDlg(CWnd* pParent = NULL); // standard constructor
public:
CString m_strNumber;
CMutex m_mutex;
CCounterThread* m_pCounterThread;
CDisplayThread* m_pDisplayThread;
void AddToListBox(LPCTSTR szBuffer);
void PriorityChange(UINT nID);

// Dialog Data
//{{AFX_DATA(CMultiThreadDlg)
enum { IDD = IDD_MULTITHREAD_DIALOG };
CString m_strBuffer;
//}}AFX_DATA

// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CMultiThreadDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL

// Implementation
protected:
HICON m_hIcon;

// Generated message map functions
//{{AFX_MSG(CMultiThreadDlg)
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
afx_msg void OnSelchangePriorityclass();
afx_msg void OnSelchangeCntrthrdpriority();
afx_msg void OnSelchangeDspythrdpriority();
afx_msg void OnPause();
afx_msg void OnClose();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_MULTITHREADDLG_H__162F3F84_AB2C_4167_A04F_5CABB7B16FAE__INCLUDED_)
// MultiThreadDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MultiThread.h"
#include "MultiThreadDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#include "ExampleThread.h"

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
CAboutDlg();

// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA

// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL

// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMultiThreadDlg dialog

CMultiThreadDlg::CMultiThreadDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMultiThreadDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CMultiThreadDlg)
m_strBuffer = _T("");
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMultiThreadDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CMultiThreadDlg)
DDX_LBString(pDX, IDC_DATABOX, m_strBuffer);
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMultiThreadDlg, CDialog)
//{{AFX_MSG_MAP(CMultiThreadDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_CBN_SELCHANGE(IDC_PRIORITYCLASS, OnSelchangePriorityclass)
ON_CBN_SELCHANGE(IDC_CNTRTHRDPRIORITY, OnSelchangeCntrthrdpriority)
ON_CBN_SELCHANGE(IDC_DSPYTHRDPRIORITY, OnSelchangeDspythrdpriority)
ON_BN_CLICKED(IDC_PAUSE, OnPause)
ON_WM_CLOSE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMultiThreadDlg message handlers

BOOL CMultiThreadDlg::OnInitDialog()
{
CDialog::OnInitDialog();

// Add "About..." menu item to system menu.

// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);

CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}

// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon

// TODO: Add extra initialization here

CComboBox* pBox;
pBox=(CComboBox*)GetDlgItem(IDC_PRIORITYCLASS);
ASSERT(pBox!=NULL);
if(pBox!=NULL)
{
pBox->AddString(_T("Idle"));
pBox->AddString(_T("Normal"));
pBox->AddString(_T("High"));
pBox->AddString(_T("Realtime"));
pBox->SetCurSel(1);
// pBox->SelectString(-1,"Normal");
}

pBox=(CComboBox*)GetDlgItem(IDC_DSPYTHRDPRIORITY);
ASSERT(pBox!=NULL);
if(pBox!=NULL)
{
pBox->AddString(_T("Idle"));
pBox->AddString(_T("Lowest"));
pBox->AddString(_T("Below Normal"));
pBox->AddString(_T("Below Normal"));
pBox->AddString(_T("Normal"));
pBox->AddString(_T("Above Normal"));
pBox->AddString(_T("Highest"));
pBox->AddString(_T("Timecritical"));
pBox->SetCurSel(3);
// pBox->SelectString(-1,"Normal");
}

pBox=(CComboBox*)GetDlgItem(IDC_CNTRTHRDPRIORITY);
ASSERT(pBox!=NULL);
if(pBox!=NULL)
{
pBox->AddString(_T("Idle"));
pBox->AddString(_T("Lowest"));
pBox->AddString(_T("Below Normal"));
pBox->AddString(_T("Below Normal"));
pBox->AddString(_T("Normal"));
pBox->AddString(_T("Above Normal"));
pBox->AddString(_T("Highest"));
pBox->AddString(_T("Timecritical"));
pBox->SetCurSel(3);
// pBox->SelectString(-1,"Normal");
}

CButton* pCheck=(CButton*)GetDlgItem(IDC_PAUSE);
pCheck->SetCheck(1);
m_pDisplayThread=(CDisplayThread*)AfxBeginThread(RUNTIME_CLASS(CDisplayThread),
THREAD_PRIORITY_NORMAL,
0,
CREATE_SUSPENDED);
m_pDisplayThread->SetOwner(this);
m_pCounterThread=(CCounterThread*)AfxBeginThread(RUNTIME_CLASS(CCounterThread),
THREAD_PRIORITY_NORMAL,
0,
CREATE_SUSPENDED);
m_pCounterThread->SetOwner(this);

return TRUE; // return TRUE unless you set the focus to a control
}

void CMultiThreadDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}

// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.

void CMultiThreadDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting

SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}

// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CMultiThreadDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

void CMultiThreadDlg::AddToListBox(LPCTSTR szBuffer)
{
CListBox* pBox=(CListBox*)GetDlgItem(IDC_DATABOX);
ASSERT(pBox!=NULL);
if(pBox!=NULL)
{
int x=pBox->AddString(szBuffer);
pBox->SetCurSel(x);

if(pBox->GetCount()>100)
pBox->DeleteString(0);
}
}

void CMultiThreadDlg::PriorityChange(UINT nID)
{
ASSERT(nID==IDC_CNTRTHRDPRIORITY||nID==IDC_DSPYTHRDPRIORITY);
DWORD dw;

CComboBox* pBox=(CComboBox*)GetDlgItem(nID);
int nCurSel=pBox->GetCurSel();
switch(nCurSel)
{
case 0:
dw=(DWORD)THREAD_PRIORITY_IDLE;
break;
case 1:
dw=(DWORD)THREAD_PRIORITY_LOWEST;
break;
case 2:
dw=(DWORD)THREAD_PRIORITY_BELOW_NORMAL;
break;
case 3:
dw=(DWORD)THREAD_PRIORITY_NORMAL;
break;
case 4:
dw=(DWORD)THREAD_PRIORITY_ABOVE_NORMAL;
break;
case 5:
dw=(DWORD)THREAD_PRIORITY_HIGHEST;
break;
case 6:
dw=(DWORD)THREAD_PRIORITY_TIME_CRITICAL;
break;
default:
dw=(DWORD)THREAD_PRIORITY_NORMAL;
break;
}

if(nID==IDC_CNTRTHRDPRIORITY)
m_pCounterThread->SetThreadPriority(dw);
else
m_pDisplayThread->SetThreadPriority(dw);

}

void CMultiThreadDlg::OnSelchangePriorityclass()
{
DWORD dw;
CComboBox* pBox=(CComboBox*)GetDlgItem(IDC_PRIORITYCLASS);
int nCurSel=pBox->GetCurSel();
switch(nCurSel)
{
case 0:
dw=IDLE_PRIORITY_CLASS;
break;
case 1:
dw=NORMAL_PRIORITY_CLASS;
break;
case 2:
dw=HIGH_PRIORITY_CLASS;
break;
case 3:
dw=REALTIME_PRIORITY_CLASS;
break;
default:
dw=NORMAL_PRIORITY_CLASS;
break;
}
SetPriorityClass(GetCurrentProcess(), dw);

}

void CMultiThreadDlg::OnSelchangeCntrthrdpriority()
{
// TODO: Add your control notification handler code here

DWORD dw;
CComboBox* pBox=(CComboBox*)GetDlgItem(IDC_DSPYTHRDPRIORITY);
int nCurSel=pBox->GetCurSel();
switch(nCurSel)
{
case 0:
dw=IDLE_PRIORITY_CLASS;
break;
case 1:
dw=NORMAL_PRIORITY_CLASS;
break;
case 2:
dw=HIGH_PRIORITY_CLASS;
break;
case 3:
dw=REALTIME_PRIORITY_CLASS;
break;
default:
dw=NORMAL_PRIORITY_CLASS;
break;
}
SetPriorityClass(GetCurrentProcess(), dw);
}

void CMultiThreadDlg::OnSelchangeDspythrdpriority()
{
// TODO: Add your control notification handler code here

DWORD dw;
CComboBox* pBox=(CComboBox*)GetDlgItem(IDC_CNTRTHRDPRIORITY);
int nCurSel=pBox->GetCurSel();
switch(nCurSel)
{
case 0:
dw=IDLE_PRIORITY_CLASS;
break;
case 1:
dw=NORMAL_PRIORITY_CLASS;
break;
case 2:
dw=HIGH_PRIORITY_CLASS;
break;
case 3:
dw=REALTIME_PRIORITY_CLASS;
break;
default:
dw=NORMAL_PRIORITY_CLASS;
break;
}
SetPriorityClass(GetCurrentProcess(), dw);
}

void CMultiThreadDlg::OnPause()
{
// TODO: Add your control notification handler code here
CButton* pCheck=(CButton*)GetDlgItem(IDC_PAUSE);
BOOL bPaused=((pCheck->GetState()&0x003)!=3);
if(bPaused)
{
m_pCounterThread->SuspendThread();
m_pDisplayThread->SuspendThread();
}
else
{
m_pCounterThread->ResumeThread();
m_pDisplayThread->ResumeThread();
}

}

void CMultiThreadDlg::OnClose()
{
// TODO: Add your message handler code here and/or call default
int nCount=0;
DWORD dwStatus;

CButton* pCheck=(CButton*)GetDlgItem(IDC_PAUSE);
BOOL bPaused=((pCheck->GetState()&0x003)!=0);

if(bPaused==TRUE)
{
pCheck->SetCheck(0);
m_pCounterThread->ResumeThread();
m_pDisplayThread->ResumeThread();
}
if(m_pCounterThread!=NULL)
{
VERIFY(::GetExitCodeThread(m_pCounterThread->m_hThread,&dwStatus));
if(dwStatus==STILL_ACTIVE)
{
nCount++;
m_pCounterThread->m_bDone=TRUE;
}
else
{
delete m_pCounterThread;
m_pCounterThread=NULL;
}
}

if(m_pDisplayThread!=NULL)
{
VERIFY(::GetExitCodeThread(m_pDisplayThread->m_hThread,&dwStatus));
if(dwStatus==STILL_ACTIVE)
{
nCount++;
m_pDisplayThread->m_bDone=TRUE;
}
else
{
delete m_pDisplayThread;
m_pDisplayThread=NULL;
}
}
if(nCount==0)
CDialog::OnClose();
else
PostMessage(WM_CLOSE,0,0);

CDialog::OnClose();
}

注意你的用词，一个是UI thread 另一个是Working thread，这两个是有点区别的。如果有问题，可以继续，我今天路过。